Technical fishway passage structures provide high passage efficiency and effective passage for adult Pacific salmonids at eight large dams.

ABSTRACT: Fishways have been widely used for upstream passage around human-built structures, but 'success' has varied dramatically. Evaluation of fishway success has typically been conducted at local scales using metrics such as fish passage efficiency and passage time, but evaluations are increasingly used in broader assessments of whether passage facilities meet population-specific conservation and management objectives. Over 15 years, we monitored passage effectiveness at eight dams on the Columbia and Snake rivers for 26,886 radio-tagged spring-summer and fall Chinook Salmon O. tshwaytscha, Sockeye Salmon O. nerka, and summer steelhead O. mykiss during their migrations to spawning sites. Almost all fish that entered dam tailraces eventually approached and entered fishways. Tailrace-to-forebay pa

SUBMITTER: Keefer ML 

PROVIDER: S-EPMC8412358 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature